The 40-year-old rapper says he initially didn't think he had a problem because he was taking prescription pills prescribed to him by a doctor.

“When I took my first Vicodin, it was like this feeling of ‘Ahh.’ Like everything was not only mellow, but [I] didn’t feel any pain,” he recalls.

But after adding Xanax and Valium to the mix, things quickly began to unravel.

“I don’t know at what point exactly it started to be a problem. I just remember liking it more and more," he admits. "People tried to tell me that I had a problem.”

"I would say ‘Get that f------ person outta here,’” Eminem recounts in the film. “I can’t believe they said that sh-- to me. I’m not out there shooting heroin. I’m not f------ out there putting coke up my nose. I’m not smoking crack.”

Ultimately, Eminem was hospitalized and on the brink of death.

“Had I got to the hospital about two hours later, I would have died," he says. "My organs were shutting down. My liver, kidneys, everything. They were gonna have to put me on dialysis. They didn’t think I was gonna make it. My bottom was gonna be death.”

"I'm looking at my kids and [realizing] 'I need to be here for this,'" he says in the film.

After a relapse and eventual detox, Eminem finally got his habit under control.

“I had to regain motor skills, I had to regain talking skills. It’s been a learning process, I’m growing," reveals the rapper. "I couldn’t believe that anybody could be naturally happy without being on something. So I would say to anybody, ‘It does get better.’”